54.89% is the change from 399 to 618
Calculation steps:
[( 618 - 399 ) ÷ 399] x 100 = 54.89%
Formula
Percentage change = [(618 - 399) / 399] x 100
Subtract the new number by the original number
618 - 399 = 219
219 ÷ 399 = 0.5488721804511278
0.5488721804511278 x 100 = 54.89%